Zend Framework:如何使用多个参数进行数据库选择？

return [
    'db' => [
        'adapters' => [
            'db1' => [
                'driver' => 'Pdo',
                'dsn' => 'mysql:host=localhost;dbname=db1',
                'username' => 'username1',
                'password' => 'password1',
            ],
            'db2' => [
                'driver' => 'Pdo',
                'dsn' => 'mysql:host=localhost;dbname=db2',
                'username' => 'username2',
                'password' => 'password2',
            ],
        ],
    ],
];

use Zend\Db\TableGateway\TableGateway;

class MyModel
{
    protected $tableGateway1;
    protected $tableGateway2;

    public function __construct($adapter1, $adapter2)
    {
        $this->tableGateway1 = new TableGateway('table1', $adapter1);
        $this->tableGateway2 = new TableGateway('table2', $adapter2);
    }

    public function fetchAll()
    {
        $resultSet1 = $this->tableGateway1->select();
        $resultSet2 = $this->tableGateway2->select();

        return [$resultSet1, $resultSet2];
    }
}

use Zend\Mvc\Controller\AbstractActionController;
use Zend\View\Model\ViewModel;
use MyModel;

class MyController extends AbstractActionController
{
    private $myModel;

    public function __construct(MyModel $myModel)
    {
        $this->myModel = $myModel;
    }

    public function indexAction()
    {
        $result = $this->myModel->fetchAll();

        return new ViewModel(['result1' => $result[0], 'result2' => $result[1]]);
    }
}